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PKS 0637-752
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Cosmology News
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1
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4673
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Title: HST observations of the quasar PKS 0637-752: equipartition electron-proton jet from the most complete spectral coverage to date Authors: Kushal T. Mehta, Markos Georganopoulos, Eric S. Perlman, Charles A. Padgett, George Chartas We present new NICMOS and ACS observations of the quasar...
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MG J0414+0534
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Cosmology News
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8
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4364
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A research group led by graduate student Violette Impellizzeri from the Max Planck Institute for Radio Astronomy has used the 100 m Effelsberg radio telescope to detect water at the greatest distance from Earth so far. The water vapour was discovered in the quasar MG J0414+0534 at redshift 2.64, wh...
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Quasar Q0957+561
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Cosmology News
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6
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5650
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Resuelven el misterio del brillo del cuásar gemelo Las variaciones en el brillo del cuásar Q0957+561, conocido como el "cuásar gemelo" debido a que su imagen llega duplicada a la Tierra, son intrínsecas al propio astro y no son causadas por efectos de la gravedad de posibles planetas o es...
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QSO J1148+5251
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Cosmology News
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6
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6785
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An intense star-forming region that produces a combined mass of more than one thousand solar masses a year has been found 12.8 billion light-years from Earth. The so-called 'hyper-starburst' is part of a young, quasar-containing galaxy. Because it is so far away, we can only see how the galaxy appe...
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Quasar 4C37.43
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Cosmology News
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0
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2052
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New data from NASA's Chandra X-ray Observatory may provide clues to how quasars "turn on." Since the discovery of quasars over 40 years ago, astronomers have been trying to understand the conditions surrounding the birth of these immensely powerful objects.
Hot, X-ray producing reg...
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Quasar 3C249.1
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Cosmology News
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0
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2213
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Quasar 3C249.1
The powerful and distant quasar 3C 249.1 has one of the largest extended emission-line regions (EELRs) known, extending out over tens of kiloparsecs of surrounding space. Astronomers Hai Fu and Alan Stockton of the Institute for Astronomy (University of Hawai'i) recently cons...
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Quasar 4C74.26
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Cosmology News
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0
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2091
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Title: The luminous X-ray hotspot in 4C 74.26: synchrotron or inverse-Compton emission? Authors: M.C. Erlund, A.C. Fabian, Katherine M. Blundell, C. Moss, D.R. Ballantyne We report the discovery of an X-ray counterpart to the southern radio hotspot of the largest-known radio quasar 4C 74.26 (w...
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Quasar Ton 34
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Cosmology News
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1
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3519
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Title: The unusual UV continuum of quasar Ton 34 and the possibility of crystalline dust absorption Authors: Luc Binette, Yair Krongold Luminous quasars are known to display a sharp steepening of the continuum near 1100A. This spectral feature is not well fitted by current accretion disk models,...
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BAL quasars
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Cosmology News
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2
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4740
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XMM-Newton has been surprised by a rare type of galaxy, from which it has detected a higher number of X-rays than thought possible. The observation gives new insight into the powerful processes shaping galaxies during their formation and evolution. Scientists working with XMM-Newton were look...
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Quasar MR2251-178
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Cosmology News
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1
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3106
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Title: Chandra LETGS spectroscopy of the Quasar MR2251-178 and its warm absorber Authors: J.M. Ramírez (1), S. Komossa (1), V. Burwitz (1), S. Mathur (2) ((1) Max-Planck-Institut für extraterrestriche Physik, Garching, Germany, (2) Department of Astronomy, Ohio State University, Columbus)...
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Quasar 3C273
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1 2
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Cosmology News
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11
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13118
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When a pair of researchers aimed the National Science Foundation's Very Long Baseline Array (VLBA) radio telescope toward a famous quasar, they sought evidence to support a popular theory for why the superfast jets of particles streaming from quasars are confined to narrow streams. Instead, the...
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Quasar PG 2130+099
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Cosmology News
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0
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2059
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Title: The Mass of the Black Hole in the Quasar PG 2130+099 Authors: C. J. Grier, B. M. Peterson, M. C. Bentz, K. D. Denney, J. D. Eastman, M. Dietrich, R. W. Pogge, J. L. Prieto, D. L. DePoy, R. J. Assef, D. W. Atlee, J. Bird, M. E. Eyler, M. S. Peeples, R. Siverd, L. C. Watson, J. C. Yee We present the results o...
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Quasar OJ287
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Cosmology News
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9
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10020
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The most massive black hole in the universe has been measured at being 18 billion solar masses. The binary black hole at the centre of quasar OJ287, which is located 3.5 billion light-years away in the constellation Cancer, has a regular pulsing light signal with two major pulses every 12 years. The l...
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Quasar 3C 287
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Cosmology News
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0
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1906
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Title: A Deep XMM-Newton Observation of the Quasar 3C 287 Authors: G. Salvesen (1), J. M. Miller (1), E. Cackett (1), A. Siemiginowska (2) ((1) University of Michigan, (2) Harvard-Smithsonian CfA) We report on an XMM-Newton observation of the z=1.055 quasar and Giga-hertz Peaked Spectrum (GPS) s...
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QSO 2237+0305
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Cosmology News
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4
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5973
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Microlensing variability in the gravitationally lensed quasar QSO 2237+0305 = the Einstein Cross. Astronomers Dissect a Supermassive Black Hole with Natural Magnifying Glasses Combining a double natural "magnifying glass" with the power of ESO's Very Large Telescope, astronome...
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Quasar 3C454.3
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Cosmology News
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7
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6146
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Calar Alto participates in a multi-observatory effort to study the most luminous quasar ever observed. The object, radio quasar 3C 454.3 in the constellation Pegasus, experienced during 2005 a strong optical outburst that made it observable even with amateur instrumentation (reaching R = 12 ma...
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High Luminosity Quasar PDS 456
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Cosmology News
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3
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4871
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Title: A Compton-thick Wind in the High Luminosity Quasar, PDS 456 Authors: J.N. Reeves, P.T. O'Brien, V. Braito, E. Behar, L. Miller, T.J. Turner, A.C. Fabian, S. Kaspi, R. Mushotzky, M. Ward PDS 456 is a nearby (z=0.184), luminous (L_bol ~10^47 erg/s) type I quasar. A deep 190 ks Suzaku observatio...
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SDSS J125454.87+084652.1
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Cosmology News
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4
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2419
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Title: SDSS J1254+0846: A Binary Quasar Caught in the Act of Merging Authors: Paul J. Green (1), Adam D. Myers (2), Wayne A. Barkhouse (3), John S. Mulchaey (4), Vardha N. Bennert (5), Thomas J. Cox (1,3), Thomas L. Aldcroft (1) ((1) Harvard-Smithsonian Centre for Astrophysics, (2) University of Il...
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Quasar 3C 196
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Cosmology News
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0
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2726
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First high-resolution image from the LOFAR radio telescope array Both, the Max-Planck-Institut für Radioastronomie (Bonn) and the Max-Planck-Institut für Astrophysik (Garching), run stations of the International LOFAR telescope (ILT), coordinated by ASTRON, the Netherlands Institute f...
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Quasar 3C 186
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Galaxies
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2
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2778
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NASA's Chandra X-ray Observatory has observed an unusual galaxy cluster that contains a bright core of relatively cool gas surrounding a quasar called 3C 186. This is the most distant such object yet observed, and could provide insight into the triggering of quasars and the growth of galaxy cluste...
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4C 02.27
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Galaxies
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0
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2085
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Title: 4C 02.27: what is inside a double-double radio quasar? Authors: S. Frey (FOMI SGO), Z. Paragi (JIVE) Recently Jamrozy et al. (2009) identified 4C 02.27 (J0935+0204) as the first possible example of a double-double radio source which is optically identified with a quasar (i.e. not a galaxy)...
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Q2237+0305
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Galaxies
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0
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2087
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Title: X-ray microlensing in the quadruply lensed quasar Q2237+0305 Authors: F. Zimmer (1), R. W. Schmidt (1), J. Wambsganss (1), ((1) ARI/Zentrum f. Astronomie, University of Heidelberg) We use archival data of NASA's Chandra X-ray telescope to compile an X-ray light curve of all four images of...
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HE 0435-1223
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Galaxies
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0
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2095
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Title: I. Flux and colour variations of the quadruply imaged quasar HE 0435--1223 Authors: D. Ricci, J. Poels, A. Elyiv, F. Finet, P. G. Sprimont, T. Anguita, V. Bozza, P. Browne, M. Burgdorf, S. Calchi Novati, M. Dominik, S. Dreizler, M. Glitrup, F. Grundahl, K. Harpsøe, F. Hessman, T. C. Hinse, A. H...
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LBQS 0103-2753
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Galaxies
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0
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1731
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Title: LBQS 0103-2753: A Binary Quasar in a Major Merger Authors: G. A. Shields, D. J. Rosario, V. Junkkarinen, S. C. Chapman, E. W. Bonning, T. Chiba We present HST and UKIRT spectra and images of the 2 kpc binary quasar LBQS 0103-2753 (z=0.858). The HST images (V- and I-band) show tidal features demo...
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OJ 287
(Preview)
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Cosmology News
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6
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4719
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Title: OJ 287 binary black hole system Authors: Mauri Valtonen, Stefano Ciprini The light curve of the quasar OJ 287 extends from 1891 up today without major gaps. Here we summarise the results of the 2005 - 2010 observing campaign. The main results are the following: (1) The 2005 October optical out...
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QQQ J1519+0627
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Cosmology News
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1
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2382
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Title: Caught in the Act: Discovery of a Physical Quasar Triplet Authors: E. P. Farina, C. Montuori, R. Decarli, M. Fumagalli We present the discovery of a triplet of quasars at z~1.51. The whole system is well accommodated within 25 arcsec (i.e., 200 kpc in projected distance). The velocity differ...
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ULAS J1342+0928
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Galaxies
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0
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2512
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ULAS J1342+0928 is the most distant known quasar detected and contains the most distant supermassive black hole, at a reported redshift of z = 7.54, surpassing the redshift of 7 for the previously known most distant quasar ULAS J1120+0641. The ULAS J1342+0928 quasar is 13.1 billion light-years aw...
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